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| 1 | Municipal wastewater treatment in China:Development history and future perspectives显示文摘China has the world's largest and still growing wastewater sector and water market,thus its future development will have profound influence on the world.The high-speed development of China's wastewater sector over the past 40 years has forged its global leading treatment capacity and innovation ability.However,many problems were left behind,including underdeveloped sewers and sludge disposal facilities,low sustainability of the treatment processes,questionable wastewater treatment plant(WWTP)effluent discharge standards,and lacking global thinking on harmonious development between wastewater management,human society and the nature.Addressing these challenges calls for fundamental changes in target design,policy and technologies.In this mini-review,we revisit the development history of China's municipal wastewater management and identify the remaining challenges.Also,we highlight the future needs of sustainable development and exploring China's own wastewater management path,and outlook the future from several aspects including targets of wastewater management,policies and technologies,especially the new concept WWTP.Furthermore,we envisage the establishment of new-generation WWTPs with the vision of turning WWTP from a site of pollutant removal into a plant of energy,water and fertilizer recovery and an integrated part urban ecology in China. | Jiuhui Qu Hongchen Wang Kaijun Wang Gang Yu Bing Ke Han-Qing Yu Hongqiang Ren Xingcan Zheng Ji Li Wen-Wei Li Song Gao Hui Gong | 2019 | Frontiers of Environmental Science & Engineering2019，13，6： | 13 |
| 2 | Development of transplanting manipulator for hydroponic leafy vegetables显示文摘The production of hydroponic leafy vegetable plug-seedlings uses coco-peat as culture substrate in South China.Coco-peat has lowered density than peat-moss,and the friction between substrate block and pickup tool is small.So,it is hard to pick up in mechanism transplantation.In order to increase the friction,the existing transplanting manipulator had relatively complex structures.To simplify the structure of transplanting manipulator and improve the stability of picking up substrate block,four stainless steel fingers with rectangular cross-section were used in this research.A vertical driving was used to realize the coupling effect that could insert and shrink at the same time,by applying different combination of constraints to the steel fingers.This could increase friction between the steel fingers and the substrate block,and then enhance the stability of the substrate block.Different combinations of constraints were applied to the rectangular stainless steel fingers(3 mm×0.8 mm).The working videos of steel fingers were taken by high-speed photography.High-speed motioned analysis software was used to acquire and analyze traces of steel fingers movements.When the length which top end of the steel fingers moved outward(M)is equal to 1.5 mm,the length which guiding part widened(N)is equal to 1 mm,the shrinking distance of steel fingers is 4.2 mm.In this research,16-day hydroponic leafy vegetable plug-seedlings were used for performance,which cultivated with coco-peat substrate with the moisture in the substrate at 81%.The transplanting manipulator was attached to a Denso robotic arm to conduct transplanting performance test.When the shrinking distance of steel fingers increased from 0 mm to 3.2 mm and the inserting angle decreased from 80°to 77°,the lifting force of substrate block increased by 118%from 1.45 N to 3.16 N.However,excessive shrinkage stirred the substrate block,which would reduce the friction between the substrate block and pickup parts and lowered the lifting force of pickup part in the substrate block.The experimental results also demonstrated that when the shrinking distance of the steel fingers reached 3.2 mm and the root distribution rate reached 46%,the success rate of transplantation was 80%.When the leafy vegetable plug-seedlings root distribution rate reached 92%,the success rate of transplantation was 96.67%.The degree of root distribution rate was positively correlated with the transplantation success rate.Therefore,in order to ensure an acceptable success rate of transplantation,the root distribution rate of leafy vegetable plug-seedlings should be at least 90%.This study provides a technical reference for developing simplified transplanting manipulator that can be used to transplant the hydroponic leafy vegetable plug-seedlings with coco-peat as the culture substrate. | Bo Li Song Gu Qi Chu Yanli Yang Zhongjian Xie Kaijun Fan Xiaogeng Liu | 2019 | International Journal of Agricultural and Biological Engineering2019，12，6： | 4 |
| 3 | Ultra-Wideband Ring-Cavity MultipleWay Parallel Power Divider显示文摘 | Song Kaijun Xue Quan | 2013 | IEEE Transactions on Industrial Electronics2013，60，10： | 1 |
| 4 | A bargaining-driven global QoS adjustment approach for optimizing service composition execution path显示文摘 | Kaijun Ren Junqiang Song Min Zhu | 2013 | The J of Supercomputing2013，63，1： | 1 |
| 5 | Broadband radial waveguide spatial combiner 显示文摘 | Song Kaijun Fan Yong He Zongrui | 2008 | IEEE Microwave and Wireless Components Letters2008，18，2： | 1 |
| 6 | Design of low-profile millimeter-wave substrate integrated waveguide power divider/combiner显示文摘 | Song Kaijun Fan Yong Zhang Yonghong | 2007 | International Journal of Infrared and Millimeter Waves2007，28，6： | 1 |
| 7 | Miniaturized triple-band bandpass filter using coupled lines and grounded stepped impedance resonators显示文摘 | Mo Yuxia Song Kaijun Fan Yong | 2014 | IEEE Microw Wireless Compon Lett2014，24，5： | 1 |
| 8 | Eight- Way Substrate Integrated Waveguide Power Divider With Low Insertion Loss 显示文摘 | SONG Kaijun FAN Yong ZHANG Yonghong | 2008 | IEEE MTT2008，56，6： | 1 |
| 9 | Broad-band Power Divider Based on Radial Waveguide 显示文摘 | Song Kaijun Fan Yong Xie Quang | 2010 | IEEE Microwave and Wireless Components Letters2010，20，1： | 1 |
| 10 | Novel broadband bandpass filters using Y-Shaped dual-mode microstrip resonators显示文摘 | Song Kaijun Xue Quan | 2009 | IEEE Microwave and Wireless Components Letter2009，19，9： | 1 |
| 11 | Kuband 200 W pulsed power amplifier based on waveguide spatially power-combining technique for industrial applications显示文摘 | Song Kaijun Zhang Fan Hu Shunyong | 2014 | Industrial Electronics IEEE Transactions on2014，61，8： | 1 |
| 12 | China: power com- biners/dividers显示文摘 | Xue Quan Song Kaijun Chan Chihou | 2011 | IEEE microwave magazine2011，，： | 1 |
| 13 | Broadband Radial Waveguide Spatial Combiner显示文摘 | Kaijun Song Yong Fan Zongrui He | 2008 | IEEE Microwave and Wireless Components Letters2008，18，2： | 1 |
| 14 | Novel broadband bandpass filters using Y-shaped dual-mode microstrip resonators显示文摘 | Kaijun Song Quan Xue | 2009 | 1EEE Microwave and Wireless Components Letters2009，19，9： | 1 |
| 15 | Compact ultraWideband bandpass filter using dual line coupling structure显示文摘 | Kaijun Song and Yong Fan | 2009 | IEEE Microwave And Wireless Components letters2009，19，1： | 1 |
| 16 | Millimeter-wave power amplifier based on coaxial-waveguide power-combining cir- cuits显示文摘 | Song Kaijun Fan Yong Xue Quan | 2010 | IEEE Microwave and Wireless Components Let- ters2010，20，1： | 1 |
| 17 | Terahertz Direct Modulation Techniques for High-speed Communication Systems显示文摘Terahertz communication technology can provide abundant frequency resources,strong confidentiality,antijamming capability,communication tracking capability and the ability to achieve highspeed data transmissions and can serve as an important technical method for high-speed communications in the future.Among these terahertz communication technologies,terahertz direct modulation technology is a key means to achieve low system complexity and power consumption.In this paper,a review and outlook of terahertz direct modulation technology are proposed from the aspects of high-electron-mobilitytransistor-based terahertz direct modulation,parallelswitch terahertz direct modulation,diode-based terahertz direct modulation,quantum cascade laser-based terahertz direct modulation and new-material-based terahertz direct modulation.We hope through this paper that more readers can gain knowledge about the development and challenges of terahertz direct modulation technology for high-speed communication systems,thus promoting the development of high-speed terahertz communication technology based on direct modulation. | Tianchi Zhou Yaxin Zhang Bo Zhang Hongxin Zeng Zhiyong Tan Xilin Zhang Lan Wang Zhi Chen Juncheng Cao Kaijun Song Ziqiang Yang | 2021 | China Communications2021，18，5： | 0 |
| 18 | Development of a high-productivity grafting robot for Solanaceae显示文摘Grafting is a green,environmentally friendly,and sustainable way to prevent soil-borne diseases.Although artificial grafting is the main grafting approach used for grafting production,it has some problems which are low productivity,unstable operating quality and labor-intensive.Hence,some countries have been engaged in the development of grafting robots for the past two decades;however,the productivity of these grafting robots has no advantage when compared to artificial grafting.This study aims to develop a high-productivity grafting robot(HPR)for Solanaceae.To improve grafting productivity,this paper adopted plug trays to feed crown-removed rootstocks automatically and carried out multi-plant simultaneous grafting to improve grafting productivity and extensibility.Manipulators were employed to take out rootstocks,increase the distance between them,and transfer them to transfer cups for the simultaneous multi-plant grafting.At the same time,negative pressure mechanisms were designed for speeding up the auxiliary feeding of root-removed scions.Although the HPR was designed in a two-operator mode,a one-operator mode can also be implemented by adjusting the control program.Tests were conducted by varying the artificial feeding speed to analyze the performance of the grafting robot.The results showed that the productivity of the robot in the two-operator mode was 2250 plants/h,and 1542 plants/h in one-operator mode;comparing the artificial feeding productivity with auto grafting productivity,it was found that the capacity of the grafting robot was higher than the feeding speed of the one-operator mode but lower than that of the two-operator mode. | Zhongjian Xie Song Gu Qi Chu Bo Li Kaijun Fan Yanli Yang Yi Yang Xiaogeng Liu | 2020 | International Journal of Agricultural and Biological Engineering2020，13，1： | 0 |
| 19 | Enhanced triallyl isocyanurate(TAIC)degradation through application of an 03/UV process:Performance optimization and degradation pathways显示文摘Triallyl isocyanurate(TAIC,C12H15N3O3)has featured in wastewater treatment as a refractory organic compound due to the significant production capability and negative environmental impact.TAIC degradation was enhanced when an ozone(O3)/ultraviolet(UV)process was applied compared with the application of an independent O3 process.Although 99%of TAIC could be degraded in 5 min during both processes,the O3/UV process had a 70%mineralization rate that was much higher than that of the independent O3 process(9%)in 30 min.Four possible degradation pathways were proposed based on the organic compounds of intermediate products identified during TAIC degradation through the application of independent 03 and O3/UV processes.pH impacted both the direct and indirect oxidation processes.Acidic and alkaline conditions preferred direct and indirect reactions respectively,with a pH of 9 achieving maximum Total Organic Carbon(TOC)removal.Both CO32-and HCO3-decreased TOC removal,however only CO32-negatively impacted TAIC degradation.Effects of Cl-as a radical scavenger became more marked only at high concentrations(over 500 mg/L Cl-).Particulate and suspended matter could hinder the transmission of ultraviolet light and reduce the production of HO·accordingly. | Yapeng Song Hui Gong Jianbing Wang Fengmin Chang Kaijun Wang | 2020 | Frontiers of Environmental Science & Engineering2020，14，4： | 0 |
| 20 | Edible mushrooms as a potent therapeutics of subclinical thyroid dysfunction among adults,especially in obese individuals:a prospective cohort study显示文摘Background:Mushrooms are a good source of many nutrients which are potentially beneficial for chronic diseases.We speculated that due to its abundant nutrients edible mushrooms might have a beneficial effect on the prevention of subclinical thyroid dysfunction(SCTD).Therefore,we designed a large-scale cohort study to examine whether mushrooms consumption is a protective factor for SCTD in adults.Methods:This prospective cohort study investigated 6631 participants(mean age:(45.0±10.2)years;55.1%men).Edible mushrooms consumption was measured at baseline using a validated food frequency questionnaire.SCTD was defined as abnormal serum thyroid-stimulating hormone levels and normal free thyroxine.Cox proportional hazards regression models were used to examine the association of edible mushrooms consumption with incident SCTD.Results:During follow-up period,a total of 262 new cases of SCTD were identified,the incidence rate of subclinical hypothyroidism was 8.9/1000 person-years and subclinical hyperthyroidism was 7.2/1000 person-years.After adjusting potential confounding factors,the multivariable hazard ratios(95%confidence intervals)for subclinical hypothyroidism were 1.00(reference)for almost never,0.53(0.29,0.97)for 1-3 times/week and 0.30(0.10,0.87)for≥4 times/week(P for trend=0.02).It also showed edible mushrooms consumption was inversely associated with subclinical hypothyroidism in obese individuals but not non-obese individuals,the final hazard ratios(95%confidence intervals)were 0.14(0.03,0.73)(P for trend<0.01).Conclusions:This population-based prospective cohort study has firstly demonstrated that higher edible mushrooms consumption was significantly associated with lower incidence of subclinical hypothyroidism among general adult population,especially in obese individuals. | Juanjuan Zhang Sabina Rayamajhi Amrish Thapa Ge Meng Qing Zhang Li Liu Hongmei Wu Yeqing Gu Shunming Zhang Tingjing Zhang Xuena Wang Zhixia Cao Jun Dong Xiaoxi Zheng Xu Zhang Xinrong Dong Xing Wang Shaomei Sun Ming Zhou Qiyu Jia Kun Song Kaijun Niu | 2023 | Food Science and Human Wellness2023，12，1： | 0 |
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